Window control



T. J. METZGER WINDOW CONTROL Aug. 4; 1970 4 SheetsSheet 1 Filed 001:. 11, 1968 INVENTOR THOMAS J. METZGER BY ATTORNEYS Aug. 4, 1970 .T. J. METZGER 3,522,675

WINDOW CONTROL Filed Oct. 11. 1968 4 Sheets-Sheet 2 F I G. 9

5 v- 9 58 INVENTOR v THOMAS J. METZGER BY MVMM B ATTORNEYS T. J. METZGER Aug. 4, 1970 WINDOW CONTROL 4 Sheets-Sheet 5 Filed Oct. 11. 1968 INVENTOR THOMAS J. 'METZGER BYi z 2 a J roRNEYs United States Patent 3,522,675 WINDOW CONTROL Thomas J. Metzger, 1720 2nd St. SE., Moultrie, Ga. 31768 Filed Oct. 11, 1968, Ser. No. 766,737 Int. Cl. Ed 13/ 08 US. Cl. 49-451 12 Claims ABSTRACT OF THE DISCLOSURE A slidable sash that is removable from -a window frame for cleaning or repair and is provided with a brake to hold the sash in a set position in the frame. The corners of the sash are provided with guides that bear on the window frame. The guides at the upper corners are screwed to the sash. Each of the guide structures at the lower corners is retained by a locking mechanism that can be operated by the fingers to withdraw the guide from the sash. The lower guides are provided with a braking mechanism to lock the sash in the set position. Removal of the guides permits the sash to be withdrawn from the frame.

This invention relates to a window control and more particularly to a control for holding a window sash in a frame and in a set position.

Devices for holding a window sash in any set position in a frame are well known but are complicated structures which have a high rate of wear and do not lend themselves to easy adaptation for use with window frames of different channel shapes.

It is therefore an object of this invention to provide a holding device for a window sash that is simple in structure.

It is a further object of this invention to provide a device as aforesaid which has a low rate of wear and which does not erode the channels of the window frame.

It is a further object of this invention to provide a device as aforesaid which can be easily modified for cooperation with channels of different shapes.

It is a further object of this invention to provide a device as aforesaid to allow removal of the sash from the frame for purposes of repair or cleaning.

These and other objects of the invention will become manifest upon reading the following description in con junction with the accompanying drawings wherein:

FIG. 1 is an interior elevational view, partly in section, showing a window with the control and guiding structure of the invention,

FIG. 2 is an exploded, perspective view of the control and guiding element,

FIG. 3 is a vertical sectional view showing the mounting of the element in the sash,

FIG. 4 is a vertical transverse section taken on the line 4--4 of FIG. 3,

FIG. 5 is a section taken on the line 55 of FIG. 3,

FIG. 6 is a section taken on the line 6-6 of FIG. 3,

FIG. 7 is a section taken on the line 7--7 of FIG. 1,

FIG. 8 is a section through the sash and frame showing a modification of the frame channel and braking cam, and

FIG. 9 is a diagram showing the forces acting on the brake.

With reference to FIG. 1 there is disclosed a window frame F secured in a wall W. The frame comprises a pair of upper and lower members 1, 3 and a pair of spaced channel members 2 and 4 for slidably receiving a window sash S. The sash comprises a rectangular frame hav ing side members 6 and 8 secured to upper and lower members 10 and 12 and is provided with a lock L and a hand grip 14 for use in lifting and lowering the sash.

3,522,675 Patented Aug. 4, 1970 A pair of guide members 16 and 18 are secured to the upper corners of the sash and comprise a bracket 20 having a pair of spaced legs 22, 24 and a flange 2-6. A screw 28 passes through an aperture in the flange and is threaded into the sash to secure the bracket thereto. A guide member 30 made of a resilient plastic, such as nylon, is shaped to fit between the legs 22 and 24 and is secured to the legs by a pin 32 extending through aligned openings in the legs and guide.

A pair of guide and brake members 34 and 36 are secured to the lower corners of the sash for guiding the sash along the guides formed by the channel members 2 and 4. These members comprise a U-shaped housing H having a pair of legs 38 and 40 formed with lateral flanges 42 and 44 and a pair of opposed channels 46 and 48. Guide plates 50 and 52 are formed of a resilient plastic such as nylon and are provided with slots 54 and 56 congruent to the flanges 42 and 44. The plates are slid over the ends of the flanges and secured thereto by slightly deforming the parts to form shallow dimples, or the plates may be bonded to the flanges by the use of any suitable adhesive.

A brake cam 58 is pivotally mounted between legs 38 and 40 by a pin 60 passing through aligned openings 62, 64, and 66. The nose portion 68 of the cam is formed congruent to the shape of the frame channel. In FIG. 3 the channel is illustrated as having a flat bottom but in FIG. 8 the frame channel 2 is shown as having a bottom shaped as a V and the nose of the cam is similarly shaped as at 68.

A spring guide 69 formed of a resilient plastic such as nylon has a pair of opposed flanges 70 and 72 and an arcuate portion 74 and is assembled in the housing by sliding the flanges 70 and 72 into the channels 46 and 48 and is secured in the channels by bonding with a suitable adhesive or by slightly deforming the parts to form shallow dimples, or by upsetting the tops of grooves 46, 48 as shown at 47, FIG. 4, to close said grooves. The guide formed by the arcuate portion 74 and the wall 76 of the housing is threaded for the reception of an adjusting screw 78.

The cam 58 is formed with a pilot 80 and the screw is formed with a pilot 82 for holding a spring 84. The pressure of the nose portion of the cam is adjusted by adjusting the bias of the spring by the adjusting screw 78. The braking force produced by the pressure of the cam against the channel is sufficient to hold the sash in any set position.

The housing is retained in the sash by means of a locking plate 86 slidably supported in a guideway in the lower sash member 12 for reciprocal movement along the line indicated by the double headed arrow 88. In the position illustrated in FIG. 3 the locking plate has been shifted under the housing to engage a tab 90 integral with Wall 76 to hold the tab against stop shoulders 92, 93 in the sash. A keeper spring 94 is secured to the sash by a screw 96 and is formed with a portion 98 extending through an opening 100 to retain the plate in the locking position. The housing may be removed from the sash by pressing on portion 98 to lift it out of the opening and shifting the locking plate to the right as viewed in FIG. 3 until portion 98 engages in opening 102 to lock the plate in the release position.

The sash is provided with a groove 104 for reception of a sealing strip 106 having filaments 108 for sealing contact with the frame. The lower portion of the frame is provided with a groove 110 for reception of an elastomeric seal 112 for sealing engagement with the shaft.

It is preferred to make the structural elements of aluminum or aluminum alloy since these materials lend themselves to formation by an extrusion process whereby 3 very complicated cross-sectional shapes may be easily formed.

The sash is provided with the usual glass G for the window and is retained in position by keeper pieces 114 locked between the glass and a retaining shoulder 116.

The sash has a width less than the distance between the channel members 2 and 4. When the guide members are removed from the corners of the sash it may be shifted in a manner to withdraw it from the frame.

In FIG. 9 there is disclosed in diagrammatic form the forces involved for determining the necessary force to be applied by the spring. In the diagram,

substituting in (1) I claim:

1. A window comprising a frame having spaced parallel channels, a sash slidably mounted in said channels, guide means secured to the corners of the sash in guiding engagement with said channels, and break means carried by some of the guide means in engagement with the channels for holding the sash in any set position, wherein the means securing the guide means at the lower corners comprises a locking plate slidably mounted in the sash and shiftable to a position beneath the housing to lock the housing in the sash and to a position removed from the housing to permit the housing to be withdrawn from the sash.

2. A window as defined in claim wherein the guide means at the upper corners of the sash are of a resilient plastic and shaped congruent to the channel.

3. A window as defined in claim 1 wherein the guide means at the lower corners comprise a housing in the sash, guide shoes of a resilient plastic secured to the housing, and a braking cam carried by the housing and biased into engagement with the adjacent channel.

4. A window as defined in claim 1 further including means for securing the locking plate in both of said positions.

5. A window as defined in claim 4 wherein the means for securing the locking plate comprises a spring secured to the sash and spaced apertures in the plate.

6. A guide and brake for a window sash comprising an elongated housing, a guide plate secured to each end of the housing, a braking cam pivotally mounted in the housing, and spring means biasing said cam around the pivot to project said cam beyond said plates.

7. A device as defined in claim 6 wherein said housing comprises a channel of U cross section, a pair of lateral flanges on the ends of the legs of the U, and a pair of opposed channels in the facing sides of the legs.

8. A device as defined in claim 7 wherein each guide plate comprises a face for engagement with a window frame and an opposed face having a recessed surface for engagement with said flanges and the facing sides of the legs.

9. A device as defined in claim 8 wherein the means for pivotally mounting the brake cam comprises an aperture in the cam and a pivot pin secured to the legs and extending through the aperture.

10. A device as defined in claim 9 wherein said spring means comprises a guide plate secured in said opposed channels and between the legs for cooperation with the base of the U to form a spring guide, a helical spring mounted in said guide in engagement with the shoe, and means for compressing the spring to adjust the pressure of the shoe against the frame.

11. A device as defined in claim 10 wherein the plates and shoe are made of a resilient plastic.

12. A device as defined in claim 11 wherein the plastic is nylon.

References Cited UNITED STATES PATENTS 2,752,185 6/1956 Coppola 49415 3,022,547 2/1962 Stegley et al. 49 423 X 3,172,145 3/1965 Miller 494l4 X 3,280,511 10/1966 Johnson 49-446 3,349,518 10/1967 Johnson 49--446 J. KARL BELL, Primary Examiner US. Cl. X.R. 49415, 423, 456 

